body{
	padding: 20px;
}
.a{
	border: 1px #666 solid;
	/* position: relative; */
}
div{
	margin: 10px;
	padding: 5px;
	font-size: 12px;
	line-height: 25px;
}
#father{
	border: 1px #666 solid;
	padding: 0px;
	/* position: relative; */
}
#first{
	background-color:green;
	border:1px #666666 dashed;
	/* position: relative; */
	top: 20px;
	left: 20px;
}
#second{
	background-color:yellow;
	border:1px #0000A8  dashed;
	position:absolute;
	top: 30px;
	/* right: 30px;
	bottom: 0px; */
	left: 0px;
}
#third{
	background-color:blue;
	border:1px #395E4F  dashed;
	/* position:relative; */
}